Server-Side Template Injection in DocsGPT by Arc53
CVE-2026-31020

9.8CRITICAL

Key Information:

Vendor

Arc53

Status
DocsGPT
Vendor
CVE Published:
4 September 2026

What is CVE-2026-31020?

The DocsGPT application, in version 0.15.0 and earlier, features a custom prompt functionality that allows user-defined inputs during chatbot interactions. This feature uses Jinja templates to render user-supplied data without proper input validation or sandboxing, exposing the application to a server-side template injection vulnerability. An attacker, without any authentication, can exploit this by injecting harmful template expressions, potentially leading to full remote code execution on the server.

References

http://arc53.com
https://github.com/PhDg1410/CVE/tree/main/CVE-2026-31020

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.